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Because of the differences in line impedances, parallel inverters with conventional droop control will have huge circulating current, which does not flow through the loads. To mitigate the circulating current, the research in this paper finds out that parallel-operated inverters should have the impedance in inverse proportion to their capacities, which is difficult to realize in practice. To meet...
This paper presents a distributed voltage unbalance compensation method for an islanded microgrid (MG) system. By using hierarchical control concept, we design a distributed compensation scheme in the secondary control layer, while the traditional inverter control methods including voltage and current PR control, droop control, virtual impedance are implemented in the primary layer. Different from...
In this paper, a framework for stability analyses of a typical inverter-based islanded microgrid with a non-linear load is presented, namely ideal constant power load (CPL) which is supplied by tightly regulated power electronics converter. The whole dynamic model of the considered microgrid is firstly developed, based on which the small signal model of system is deduced at stable operating point...
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